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Understanding
Pancreatic Cancer

Pancreatic cancer occurs when malignant cells develop in the tissues of the pancreas. It is the 7th leading cause of cancer-related death worldwide with over 495,000 new cases diagnosed and over 466,000 deaths in 2020.101 In Hong Kong, pancreatic cancer is the 5th leading cause of cancer deaths, and its incidence and mortality have both increased significantly over the past decade - from 2009 to 2019, the number of new cases diagnosed increased by 90%, and the number of deaths jumped by 65%.102

FACTS OF 2019102

* SOURCE: HOSPITAL AUTHORITY, HKSAR

* SOURCE: HOSPITAL AUTHORITY, HKSAR

Signs and symptoms

The pancreas is an organ that sits behind the stomach. In adults it is about 15 cm long and less than 5 cm wide and can be divided into three parts: the head, the body, and the tail.103 The pancreas has two main functions - to make pancreatic enzymes that help digest food, and to produce insulin and glucagon, that help control blood sugar levels.104

Pancreatic cancer is sometimes called a “silent cancer” because there are generally no symptoms in the early stages.105 When people do have symptoms, they are often similar to the symptoms of other medical conditions, such as a stomach ulcer,105 and can often be overlooked by both patients and medical professionals.

Signs and symptoms of pancreatic cancer may include: 105

  1. Signs of jaundice, such as yellowing of the skin and eyes, darkening of the urine, itchy skin, and clay-colored stool
  2. Pain in upper abdomen or upper back
  3. Painful swelling of an arm or leg
  4. Burning feeling in stomach or other gastrointestinal discomforts
  5. Stomach bloating
  6. Floating stools with a particularly bad odor and an unusual color
  7. Weakness and feeling very tired
  8. Loss of appetite
  9. Nausea and vomiting
  10. Chills and sweats
  11. Fever
  12. Unexplained weight loss

Causes and risk factors

The exact cause of pancreatic cancer in an individual is still being researched upon. However, many risk factors associated with pancreatic cancer have been identified. Some of them include:106

  • Age

    Most people with pancreatic cancer are older than 45. About 90% are older than 55 and 70% are older than 65.

  • Gender

    More men are diagnosed with pancreatic cancer than women.

  • Race

    People of African origin are more likely than Asian, Hispanic, or Caucasians to develop pancreatic cancer.

  • Smoking

    People who smoke tobacco are 2 to 3 times more likely to develop pancreatic cancer than non-smokers.

  • Obesity

    Obese and even overweight people have a higher risk of developing pancreatic cancer.

  • Diabetes

    Pancreatic cancer is more common in people with diabetes.

  • Chronic pancreatitis

    Chronic pancreatitis is linked with an increased risk of pancreatic cancer.

  • Chemicals

    Exposure to certain chemicals such as pesticides, benzene, certain dyes, and petrochemicals may increase the risk of developing pancreatic cancer.

  • Family history

    Pancreatic cancer may result from genetic mutations passed from parent to child. This is called familial pancreatic cancer (FPC). Several genes, such as BRCA1 and BRCA2, are linked to FPC families.108

BRCA gene mutations and pancreatic cancer

Mutations in the BRCA1 and BRCA2 genes increase a person’s risk for several cancers, including pancreatic cancer.107

For carriers of mutations in BRCA2, the lifetime risk of developing pancreatic cancer is estimated to be 5-10%; mutations in BRCA1 are estimated to lead to a 2-4 times increased risk. 107

Many guidelines now recommend genetic testing for any person diagnosed with pancreatic cancer, regardless of their family history of cancer or age at diagnosis.107, 108

The identification of an inherited gene mutation is being used to help direct cancer treatment and screening. Genetic counseling is essential before and after genetic testing.

  • 5-10% LIFETIME RISK
    of BRCA2 developing pancreatic cancer107
  • 2-4 TIMES RISK
    of BRCA1 lead to develop pancreatic cancer107

Diagnosis

If pancreatic cancer is suspected, doctors will initiate a series of tests to help confirm the presence of the cancer. If cancer is found, more tests will be done to help determine the stage of the cancer.

Tests for pancreatic cancer may include: 109
01

General tests

These tests may include asking about the patient's medical and family history; performing a physical examination to look for signs of pancreatic cancer or other health problems; and possibly ordering blood, urine, and stool tests. Blood tests may include liver function and tumor markers tests.

02

Imaging tests

Imaging tests help doctors find out where the cancer is located and whether it has spread from the pancreas to other parts of the body. Imaging tests may include:

  • Computed tomography (CT) scan
    Using X-rays taken from different angles, a CT scan can show the pancreas quite clearly.It can also help show if cancer has spread to nearby organs, as well as to lymph nodes and distant organs.
  • Magnetic resonance imaging (MRI)
    MRI scans use radio waves and strong magnets instead of X-rays to make detailed images of parts of the body such as the pancreas.
  • Ultrasound
    An ultrasound uses sound waves to create a picture of the internal organs such as the pancreas. The two commonly used types for pancreatic cancer are abdominal ultrasound and endoscopic ultrasound.
  • Cholangiopancreatography
    This is an imaging test that looks at the pancreatic ducts and bile ducts to see if they are blocked, narrowed, or dilated.Endoscopic retrograde cholangiopancreatography (ERCP), magnetic resonance cholangiopancreatography (MRCP), and percutaneous transhepatic cholangiography (PTC)are the three commonly used types.
  • Positron emission tomography (PET) scan
    In a PET scan, patients are injected with a radioactive sugar substance, which collects mainly in cancer cells. A scanner then detects this substance to create a picture of areas of radioactivity in the body. This test is sometimes used to reveal whether a pancreatic cancer has spread.

03

Biopsy

A biopsy removes a small sample of tumor to look at it under the microscope. Other tests can suggest that cancer is present, but only a biopsy can confirm a diagnosis. Biopsies can be done in different ways, such as percutaneous biopsy, endoscopic biopsy, and surgical biopsy.

04

Lab tests of biopsy samples

The samples taken during a biopsy are sent to a lab to see if they contain cancer cells under a microscope. If cancer is found, other tests might be done to find out if the cancer cells have mutations in certain genes, such as the BRCA1 and BRCA2 genes. This may help doctors make the most appropriate treatment decision.

05

Genetic counseling and testing

People with pancreatic cancer are recommended for genetic counseling and testing because some of them have germline mutations, such as BRCA mutation. Testing for these gene mutations might be helpful in making treatment decision, and in deciding if other family members should consider genetic counseling and testing as well.

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TYPES OF PANCREATIC CANCER

TYPES OF PANCREATIC CANCER

Types of pancreatic cancer can be divided into two main categories.
  • EXOCRINE PANCREATIC CANCER

    About 95% of pancreatic cancers are of exocrine origin (i.e, develops in the ducts of the pancreas).110 Exocrine cells make pancreatic enzymes, which are digestive juices.
  • NEUROENDOCRINE PANCREATIC CANCER

    Pancreatic neuroendocrine tumors (NETs) develop from cells in the endocrine gland of the pancreas, which makes the hormones insulin and glucagon to regulate blood sugar. Neuroendocrine cancers are rare and constitute less than 5% of all pancreatic cancer cases.111

DIAGNOSES & TREATMENT

Staging is used to determine the extent of the cancer. Pancreatic cancer is staged as follows.112

Stage 0112

Also called carcinoma in situ, in which abnormal cells are found in the lining of the pancreas. These abnormal cells may become cancer and spread into nearby normal tissue.

Stage I112

The cancer is limited to the pancreas but has grown to 2 cm or smaller (stage IA) or larger than 2 cm but smaller than 4 cm (stage IB).

Stage II112

Depending on the size of the tumor and where the cancer has spread, stage II is divided into stages IIA and IIB. In stage IIA, the cancer is larger than 4 cm, and in stage IIB, the cancer is any size and has spread to 1-3 nearby lymph nodes.

Stage III112

The tumor is any size and cancer has spread to 4 or more nearby lymph nodes, or to the major blood vessels near the pancreas, but has not spread to other parts of the body.

Stage IV112

The tumor is any size and cancer has spread to other parts of the body, such as the liver, lung, or peritoneal cavity.

Recurrent112

Recurrent pancreatic cancer is the cancer that has come back after treatment. The cancer may come back in the pancreas or in other parts of the body.

Surgery
Radiotherapy
Chemotherapy
Targeted therapy
Immunotherapy

TREATMENT OPTIONS

Different types of treatment are available for patients with pancreatic cancer. Treatment options and recommendations depend on several factors, including the type and stage of cancer, possible side effects, and the patient’s preferences and overall health. Patients should discuss with their doctor to decide on the most appropriate treatment for them.

Surgery

Surgery for pancreatic cancer includes removing all or part of the pancreas, depending on the location and size of the tumor in the pancreas. Only about 20% of pancreatic cancer patients are able to have surgery because most pancreatic cancers are found after the disease has already spread.113

One of the following types of surgery may be used to remove the tumor:

1A
Whipple procedure112
This is an operation to remove a cancer in the head of the pancreas. In the procedure, the head of the pancreas, the gallbladder, part of the stomach, part of the small intestine, and the bile duct are removed.
1B
Total pancreatectomy113
This operation is used to remove the cancer that has spread throughout the pancreas or is located in many areas in the pancreas. In the procedure, the whole pancreas, part of the stomach, part of the small intestine, the common bile duct, the gallbladder, and the spleen are removed.
1C
Distal pancreatectomy113
This surgery is commonly done if the cancer is located in the tail of the pancreas. In the procedure, tail and body of the pancreas, as well as the spleen are removed.

Surgery

Surgery for pancreatic cancer includes removing all or part of the pancreas, depending on the location and size of the tumor in the pancreas. Only about 20% of pancreatic cancer patients are able to have surgery because most pancreatic cancers are found after the disease has already spread.113

One of the following types of surgery may be used to remove the tumor:

1A
Whipple procedure112
This is an operation to remove a cancer in the head of the pancreas. In the procedure, the head of the pancreas, the gallbladder, part of the stomach, part of the small intestine, and the bile duct are removed.
1B
Total pancreatectomy113
This operation is used to remove the cancer that has spread throughout the pancreas or is located in many areas in the pancreas. In the procedure, the whole pancreas, part of the stomach, part of the small intestine, the common bile duct, the gallbladder, and the spleen are removed.
1C
Distal pancreatectomy113
This surgery is commonly done if the cancer is located in the tail of the pancreas. In the procedure, tail and body of the pancreas, as well as the spleen are removed.
Radiotherapy

Radiotherapy is a cancer treatment that uses high-energy X-rays or other types of radiation to kill cancer cells. The most common type of radiotherapy is called external beam radiotherapy, which is radiation given from a machine outside the body.113 Other types of radiotherapy may also be offered. Patients should talk with their doctor about the most appropriate treatment for them.

Radiotherapy

Radiotherapy is a cancer treatment that uses high-energy X-rays or other types of radiation to kill cancer cells. The most common type of radiotherapy is called external beam radiotherapy, which is radiation given from a machine outside the body.113 Other types of radiotherapy may also be offered. Patients should talk with their doctor about the most appropriate treatment for them.

Chemotherapy

Chemotherapy uses drugs to kill cancer cells or stop them from growing, dividing, and making more cells.113 It can be taken by mouth or injected into a vein or muscle. A chemotherapy regimen usually consists of a specific number of cycles given over a set period of time.

Chemotherapy is often part of the treatment for pancreatic cancer and may be used:114

1A
Before surgery
(known as neoadjuvant chemotherapy) to shrink larger cancer so it can be removed with less extensive surgery.
1B
After surgery
(known as adjuvant chemotherapy) to kill any cancer cells that have been left behind or have spread but cannot be seen.
1C
For advanced pancreatic cancer
when the cancer is advanced and cannot be removed completely with surgery, or if surgery is not an option, or if the cancer has spread to other organs.

There are several standard chemotherapy drugs used for pancreatic cancer. Patients should discuss with their doctor to decide the most appropriate treatment for them.

Chemotherapy

Chemotherapy uses drugs to kill cancer cells or stop them from growing, dividing, and making more cells.113 It can be taken by mouth or injected into a vein or muscle. A chemotherapy regimen usually consists of a specific number of cycles given over a set period of time.

Chemotherapy is often part of the treatment for pancreatic cancer and may be used:114

1A
Before surgery
(known as neoadjuvant chemotherapy) to shrink larger cancer so it can be removed with less extensive surgery.
1B
After surgery
(known as adjuvant chemotherapy) to kill any cancer cells that have been left behind or have spread but cannot be seen.
1C
For advanced pancreatic cancer
when the cancer is advanced and cannot be removed completely with surgery, or if surgery is not an option, or if the cancer has spread to other organs.

There are several standard chemotherapy drugs used for pancreatic cancer. Patients should discuss with their doctor to decide the most appropriate treatment for them.
Targeted therapy

Targeted therapy is a type of drug treatment that targets the cancer’s specific genes, proteins, or the tissue environment that contributes to cancer growth and survival.113 This type of therapy blocks the growth and spread of cancer cells and limits damage to healthy cells.

Some targeted therapies only work in people whose cancer cells have certain genetic mutations, such as BRCA1 and BRCA2 mutations. To find the most effective treatment, doctors may advise their pancreatic cancer patients to take tests to identify the genes, proteins, and other factors in their tumor cells. This helps doctors better match each patient with the most effective treatment whenever possible.113

Targeted therapy

Targeted therapy is a type of drug treatment that targets the cancer’s specific genes, proteins, or the tissue environment that contributes to cancer growth and survival.113 This type of therapy blocks the growth and spread of cancer cells and limits damage to healthy cells.

Some targeted therapies only work in people whose cancer cells have certain genetic mutations, such as BRCA1 and BRCA2 mutations. To find the most effective treatment, doctors may advise their pancreatic cancer patients to take tests to identify the genes, proteins, and other factors in their tumor cells. This helps doctors better match each patient with the most effective treatment whenever possible.113

Immunotherapy

Immunotherapy is a type of treatment designed to boost the body's natural defenses to fight the cancer. It uses materials made either by the body or in a laboratory to improve, target, or restore immune system function.113

Certain types of immunotherapy can be used to treat pancreatic cancer. Patients should talk with their doctor about the most appropriate immunotherapy for them.

Immunotherapy

Immunotherapy is a type of treatment designed to boost the body's natural defenses to fight the cancer. It uses materials made either by the body or in a laboratory to improve, target, or restore immune system function.113

Certain types of immunotherapy can be used to treat pancreatic cancer. Patients should talk with their doctor about the most appropriate immunotherapy for them.

01
I am receiving pancreatic cancer treatment, what should I pay attention to in my daily care?
Cancer can cause physical and emotional strain, so people with pancreatic cancer should look after their wellbeing during and after the treatment.

General recommendations may include:

  • Maintaining good nutrition:115,116 Healthy food can help a person cope with treatment and side effects. Balanced diet with adequate protein can help people with pancreatic cancer maintaining a healthy body weight. In addition, eating small, frequent meals can help reduce fatigue. Depending on the type and location of pancreatic cancer, some individuals need to avoid excess fat intake due to pancreatic enzyme insufficiency. And the use of enzyme supplements can often help with fat digestion. Patients are encouraged to work with a dietitian to determine an individualized diet that works best for their digestive system.
  • Staying active:116 Physical activities can reduce tiredness, improve circulation, and lift mood. The right exercise for a pancreatic cancer patient depends on many factors, such as what treatment is being used, how the patient feels, and what is his or her general health condition. Patients should talk with their doctor to help them develop an exercise plan.
  • Complementary therapies:116 Complementary therapies are designed to be used alongside conventional medical treatments. Therapies such as massage and relaxation can increase a person’s sense of control, decrease stress and anxiety, and improve mood. Patients should talk with their doctor about any therapies they are using or thinking about trying, as some may not be safe, or evidence based.
02
My pancreatic cancer treatment is completed, what follow-up care should I take?
A cancer patient’s follow-up care may include regular physical examinations and medical tests to keep track of the recovery in the months and years ahead. Different people have different risks, so pancreatic cancer patients should talk with their doctor about how their risk affect their schedule of follow-up care.

Main follow-up care may include:

  • Watching for cancer recurrence:117 Sometimes pancreatic cancer does come back after treatment. During follow-up care, a doctor will ask specific questions about the patient’s health. Blood tests or imaging tests may sometimes be recommended as part of regular follow-up care, but testing recommendations depend on several factors, such as the type and stage of cancer first diagnosed, and the types of treatment given.
  • Managing long-term and late side effects:117 Some patients may experience side effects that linger beyond the treatment period, which are called long-term side effects. Other side effects called late effects may develop months or even years afterwards. Long-term and late effects can include both physical and emotional changes. Patients should talk with their doctor about their risk of developing late effects.
03
I am a pancreatic cancer patient. Why would my doctor suggest a BRCA test?
Because a number of pancreatic cancer patients have inherited BRCA1 or BRCA2 gene mutations,107 taking BRCA tests may help your doctor decide a personalized treatment based on the test results. For pancreatic cancer patients, genetic testing not only opens up drug options and improves the effectiveness of the treatment, but it can also provide useful information to the patient's family on the risk of developing cancer if inherited BRCA mutations are found.
04
Is the BRCA testing an internationally recognized procedure?
Currently, many guidelines on BRCA testing for BRCA-related cancer including pancreatic cancer are available worldwide. For example, the most updated guidelines from the US National Comprehensive Cancer Network (NCCN) and American Society of Clinical Oncology (ASCO) recommend offering genetic counseling and testing to all patients diagnosed with pancreatic cancer.107 Importantly, people should have genetic counselling before taking germline BRCA tests.
05
What is genetic counselling?
Before any genetic test is done, doctors and nurses with specialized training or genetic counseling specialists will carry out genetic counseling with the patients. This is to explain the testing procedures, risks, and clinical significance of different test results, and to discuss the impact of the result on the patients and their family, including emotional effects, parenting and birth control, screening, and decisions on treatment.118,119 After the genetic counseling, patients will decide whether they would want to receive the genetic test.

(Note: Hong Kong Academy of Medicine would like to remind the public, any genetic test without appropriate advice, counseling and data analysis may lead to additional medical risk and inaccurate test results, and the lack of professional interpretation and advice may also cause unnecessary anxiety or a false sense of safety.)120

FAQ

FOR CAREGIVERS

If you are a caregiver to take care of a pancreatic cancer patient, you are playing an important role! You are the one taking care of the patient’s daily and medical care during and after the treatment. But do not forget to look after yourself, as you must be strong enough to go through this journey with the patient. The following suggestions may help you as a caregiver:

Understand pancreatic cancer

Understand pancreatic cancer

The process of pancreatic cancer diagnosis and treatment is a difficult journey for patients, and they need understanding, care, and empathy from people around them. Gathering the latest information on pancreatic cancer can help you understand the physical change and conditions of the patient, thus facilitate better communication.

Try to de-stress

Try to de-stress

As a caregiver, you are under huge stress. Learn how to de-stress and to deal with your own emotions, such as anxiety, distress, and negative feelings.

Seek help

Seek help

Caregivers are just ordinary people - we only have limited energy and capability. When caregivers find it difficult to deal with the caregiving work, they should be more open and seek help from other relatives, healthcare professionals, or community resources. Remember that you are not alone as a caregiver.

Talk to others

Talk to others

It is reasonable to have feelings and emotions when seeing our beloved one suffers, or when you have to take over the responsibility as a caregiver. Talk with your friends, family members, healthcare professionals, or patient's groups, sharing your feelings and avoiding the accumulation of negative emotions.

Be considerate

Be considerate

If the patient is your partner, you should understand that your sex life may be affected when your partner is undergoing chemotherapy, after the surgery, or when the disease is at advanced stages. Be considerate and treasure the time together.

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102. Hospital Authority, HKSAR. Overview of Hong Kong cancer statistics of 2019. 4 October 2021. Available at: https://www3.ha.org.hk/cancereg/pdf/overview/Overview%20of%20HK%20Cancer%20Stat%202019. Accessed: 19 October 2021.
103. American Cancer Society. What is pancreatic cancer? 11 February 2019. Available at: https://www.cancer.org/cancer/pancreatic-cancer/about/what-is-pancreatic-cancer.html. Accessed: 3 September 2021.
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107. Robert Pilarski. The role of BRCA testing in hereditary pancreatic and prostate cancer families. Am Soc Clin Oncol Educ Book. 2019;39:79-86. Available at: https://ascopubs.org/doi/pdf/10.1200/EDBK_238977. Accessed: 3 September 2021.
108. Cancer.Net. Doctor-Approved Patient Information from ASCO. Familial pancreatic cancer. January 2020. Available at: https://www.cancer.net/cancer-types/familial-pancreatic-cancer. Accessed: 3 September 2021.
109. American Cancer Society. Tests for pancreatic cancer. 2 January 2020. Available at: https://www.cancer.org/cancer/pancreatic-cancer/detection-diagnosis-staging/how-diagnosed.html. Accessed: 3 September 2021.
110. American Cancer Society. What is pancreatic cancer? 11 February 2019. Available at: https://www.cancer.org/cancer/pancreatic-cancer/about/what-is-pancreatic-cancer.html. Accessed: 3 September 2021.
111. Martin MR, et al. Metastatic well-differentiated neuroendocrine carcinoma of the pancreas: case report and review of literature. Cases Journal. 2009;2:8973. Available at: https://casesjournal.biomedcentral.com/track/pdf/10.4076/1757-1626-2-8973.pdf. Accessed: 3 September 2021.
112. National Cancer Institute. Pancreatic cancer treatment (adult) (PDQ®) – patient version. 11 December 2020. Available at: https://www.cancer.gov/types/pancreatic/patient/pancreatic-treatment-pdq. Accessed: 3 September 2021.
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115. American Institute for Cancer Research. Diet and nutrition tips for pancreatic cancer. 29 November 2017. Available at: https://www.aicr.org/news/pancreatic-diet-tips-for-cancer-american-institute-for-cancer-research/. Accessed: 3 September 2021.
116. Cancer Council Australia. Understanding pancreatic cancer - a guide for people with cancer, their families and friends. Februay 2020 edition. Available at: https://www.cancer.org.au/assets/pdf/understanding-pancreatic-cancer-booklet. Accessed: 3 September 2021.
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